Cultivator



J. J. KOVAR. CULTIVATOB.

APPLICATION man 061231. 1519. I

Patented June 6, 1922..

3 $HEETSSHEET l.

M H Hm LEE Q 5 in. N 3 /A UN A E Mg Mw mmm J. J. KOVAR.

CULTIVATOR.

APPLICATlON HLED OCT. "3I, I9l9.

1,418,807. Patented Junefi, 1922.

J. J. KOVAR.

summon. APPLICATION FILED OCT, 31. 1-919.

3 SHEETS-SHEET 3- Patented June 6,

JOSEPH J. KOVAEt, 0T3 OVJAIONNA, MINNESOTA.

CULTIVATOR.

Specification of Letters latent. Patented J 11119 6, 1922.

Application filed October 31, 1919. Serial No. 334,680.

T 0 all whom it may concern:

Be it known that I. Josnrrr J. KovAR, a.

novel devices and combinations of devices,

hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indi cate like parts throughout the several views.

Referring to the drawings Fig. 1 is a plan view of the. improved cultivator, with some parts broken away;

Fig. 2 is a side elevation of the same;

Fig. 3 is a view partly in rear elevation and partly in transverse vertical section taken on the line 3-3 of Fig. 2;

Fig. 4 is a detail view principally in transverse vertical section taken on the line 41- 1 of Fig. 2, on an enlarged scale;

Fig. 5 is an outside elevation of the parts shown in Fig. 4; s

Fig. 6 is a detail view principally in sea tion taken on the irregular line 6-6'of Fig. 3. on an enlarged scale;

Fig. 7 is a fragmentary detail view in side elevation with some parts sectioned on the line 7-7 of Fig. 3; p c

Fig. 8 is a fragmentary perspective view of the connection between one ofthe ground working tools and the respective supplemental frame; and I Fig. 9 is a plan view of the pointed end of one of the ground-working tools.

The numeral 10 indicates'a draft pole, to the rear end of which is rigidly secured a main frame 11. A draft equalizer 12 is pivoted to the pole 10, and a seat 13.0f an operator is secured to the main frame 11. The main frame 11 is supported on the intermediate tubular member 14 of a threepart yoke-like axle and pivotally secured thereto by clip-like bearings 15. The end members 16 of the axle are. L-shaped and the horizontal arms thereof are telescoped into the ends of the axle member 14 and adjustably secured thereto by longitudinally splitting the ends of said member 1 1 and placing therearound clamping collars 17. These clamping collars 17 are. preferably mounted in annular grooves formed in the axle member 141 to hold the same against axial movement thereon.

The vertical or downturned arms on the.

axle members 16ers pivoted in upright tubular bearing sleeves 18 having on their lower ends cooperating half-bearings 19 connected by draw-bolts 20. The inner ends of a pair of axially aligned trunnions 21 are clamped betweenthe half-bearings 19 and heldagainst axial movement therein by forming thereon annular collars 22 which are mounted in correspondingly formed grooves 23 in said half-bearings. .A,pair

of laws main wheels 2 1 is journaled on the trunnions 21 and held against removal therefrom by nuts 25 which have screw-threaded engagement with the outer ends of the trunnions 21.

The main wheels 24 are connected for simultaneous steering movement by securing to the upper ends of the bearing sleeves 1.8 forwardly projecting arms 2b. the free ends of which are connected by a transverse tiebar 27 having an intermediate yoke 28. To impart steering movement to the main wheels 24-, and also hold the same against pivotal movement on the axle members 16.

there is secured to the upper ends of the.

bearing sleeves 18 a pair of inwardly projecting foot lovers 29 arranged to be controlled by an operator seated in the seat 13 and with his feet resting on said levers. These foot levers 29 also act as foot rests for the operator.

Underlying the main frame 11 is a pair of supplemental frames 30 that are laterally spaced and each thereof is connected to the draft pole 10 by an upwardly and forwardly inclined drag bar 31, the forward endof.

which is curved inward and pivotedat 32 to said pole to permit horizontal transverse swinging movement of the respective supplemental frames 30. The rear ends of the drag bars 31 are connected to the supplemental frames 30 by pairs of nut-equipped bolts 33; the rearmost of whichin each pair are extended through upright slots 34 in the drag bars 31 to permit vertical angular adjustment of the supplemental frames 30 in respect to said drag bars.

The two supplemental frames 30 are rigidly collected by a transverse tie-har35 having at its intermediate portion a yoke, the vertical members o'l which are moinrterl in svviveled hearings b6 on the vertical members of the yoke 28 with freedom. for vertical sliding movement therein. The ends of the tiebar 35 rest upon the supplemental frames 30 and are rigidly but adjustably secured thereto by clips 37. The purpose of thus connecting the sup 'ilemen tal frames 30 in respect to the tie-bar 27 is to cause said "frames to move laterally in respect to the main ivh els when angular steering movement is imparted thereto.

A. gang; 0'1 groiind-Working; tools in the form of spring teeth 38 is carried by each supplemental frame 30 and each oi said teetlris secured to the respective frame 30 by :1 post 39 having on its lower end a horizontal stud 4:0. The upper ends of the teeth 38 are made segmental to tit around the studs 40 and have formed therein longitudinal slots ll. through which and aligned bores in said studs extend clamping bolts by means of which said teeth may he clamped to the studs 40. Obviously. hy cireumterentially adjusting the teeth on the studs 40 by means of the bolts 42. the points of said teeth may he seteither tor- Ward or backward. at Will.

The posts 39 are rigidly"secured to the supplemental frames 30 with freedom For verticaladjustment by blocks. 4; clamping bars 44, and nutequipped draw-bolts il-5. On each vertical face of each block 431's integrally termed upper and lower pairs of horizontally projecting lugs "th. The lu e 46, on one side of the blocks 43. are arranged to engage the horizontal edges of the side members of the r-iuppleinental trainee 30 and interlock said blocks thereto against angular movement and the lugs 46 on the other side of said blocks are arranged to engage the vertical edges of the hars 39 and interlock said posts thereto with free dom for vertical sliding; movement. By reference to Fig. 8. it will he noted that the blocks 43 are reversil'ile so that the on either side thereof may be arranged to interlo'elcwith the side members ol: the sup" pl'einental frames 30 or to interlock with the posts The clamping hairs M extend transversely across the outer hues of the posts 39 betiveenthe respective.upper and. lower pairs of lugs 46. and the bolts 45 e5;- tend through aligned bores in the 'dc mem bers ol the supplementaltrainee '10. hiochs andends oli the clai'npinjir liars i l. By reference to Fig. 2th? will he noted that there is formed in the side members of the supplemental. frames 30 a plurality of long'ltudnia'lly spaced bores. tor the draw-bolts 4.5."sdthat th bloeks 4 may he'adjusthd either forward or-heckw'ard ODStIlCl'LlIEHIIQSu movement clamping rollers 55 and co-opci'atingr \vaslo ers 56. on the rook-shaft 49. are pii'ovided To support the supplemental frames 30 with the teeth 3?. set into the ground at a predetermined depth, caster Wheels 4L7 are journaled in brackets 48 having stems sun eled in said frames. Opposing collars 4h", on the stems of: the caster Wheel brackets 41-8. engage the supplemental frames 30 and support th same in dilii'erent vertical positions. Referring more specifically to the spring teeth 38. it may be here stated that the points oi? said teeth at the junction with the bodies thereoil, are somewhat Wider than said bodies. and that the outside angle ot said points is i'natcrially greater than the inside angle thereof, as shown in Fin. 9.

To independently or simiiltaneously raise and lower the supplemental frame 30. the

following connections are provided. to wit:

Extending parallel to the transverse portion of the axle member I l and slightly tor- Jttl'ffl thoij'eol, is a square rock-shalt ll) havj "-ecured to its ends hubs 5d. the inner ends of which are journaled in hearing brackets 51 ri idly secured to the side men? hers oi the main frame ll. l loosel} tul crumed on the outer end oi. each huh 50 i; a

latch lever 52.] and (re-operating therewith is a lock segment 53. havinglaterally projecting stop lugjs 54. which limit the oscillatory movement oi" said lover; The lock segments 53 are integrally formed. with the hubs 50 between i and latch levers fillthr coi'nmon oscillatory therewith. Inner and outer lorholdinu'the hubs 50 against axial movement on said rock-shaft.

.lilach supplemental tr'ame ldlias attaehei'l thereto. at substantially its lonirituclinal entera liilting' chain 58 adj ustahly connected by ajhoolr 59 to the intermediate porinent therewith. and its loch segment 6 rigidly s cured *to theniain frame ll (lhviousl x by manipulating the li iti'h lever 60 the latch levers will alsdhe 0's:

oilla-ted therewith tor the rezisonthat thcv are locked to therock sliatt 4:9 livthe loch settrnents 53. It is further evident that when. the'lateh levers 52 areos rcillated with the rock-shaft 49; the supplemental frames 30 Will he simultaneously raisedoi" lowered by thellefrible connection Theseflexible connections 58 also permit the supplemental frames; (l to l" inhtly independently vertically ad Listed. Hit, of cotirse, understood the hearing hracltets 511,

and co operating Washor56 for move that when one of the supplemental frames 30 is raised or lowered. the connected tie-bar will also move, owing to the swiveled con nections of its bearings 36, and thereby transverselymove the other supplemental frame 30. The member 35 is loosely fitted in. member 256 so that a. sliding movement between these members is permitted. The flexible connections also permit independent adjustment of the supplemental frames by securing different links of said chains on the hooks 59. By vertically adjusting the posts 39 on the blocks 43, further means is provided to regulate the depth at which the points of the teeth 38 enter the ground may be varied at will;

To assist in raising the lever to lift the supplemental. frames 30, the pull on the machine is utilized and the following connections are provided for performing this function, to wit: j

Journaled in bearings 62 on the main frame ll is a transverse rod 6311a ving; on its ends depending crank arms 6 1 the lower ends of which are connected. by links therein havinghooks at their outer ends which as shown in Fig. 2, pass through lugs on the lower ends of the bearing sleeves 1.8. A link 66 also connects .thdshort end of the lever 60 to the outer end of the righthand crank arm 64:. Obviously, by unlatching; the lever 60 from the lock segment 61, the pull. on the frame 11. will rock the axle portions 14. 16 and 18 forward under the retarding action of the wheels 24. This retarding action of the wheels 24 will hold. the short end of the lever 60 through the links 65 and 66 and thereby, under the advance movement of the frame 11 in respect to the wheels 24-, cause the lever 60 to swing: upward on. its fulcriun. The operator, by holding; the lever 60, may controlthis upward movement of said lever.

To lower the supplemental. frames 36 and set the teeth 38 into the ground, theopera-- tor may pull the lever 60 toward himself, which is an easy operation for the reason that the weight of said frames greatly as sists this operation. Preferablvthe vertical portions of the axle will be in a slightly rearwardly inclined position when the "teeth 38 are in the ground, and, when said. teeth are out o the ground, said vertical portions to work therethrough and around the plants-1.

These shields 67 are secured. to the rear endsnecting said crank arms, two laterally spaced supplemental frames, ground-working tools earriedby the. supplemental. frames,

and a tie-bar rigidly connecting the supple mental frames and secured for common transverse movement in respect't'o the first noted tie-bar but with freedom to permit raising and lowering movements of the sup; plemental frames in respect to the main frame.

2. A. cultivator including a main frame,

crank-arm-equipped trunnions connected to;

the main frame by vertical pivots, wheels journaled on thetrunnions, a tiebar coir" n'ectinp'; said crank arms, and having an intermediate arch, two laterally spaced supplemental frames, ground-working tools carried by the supplemental frames and having an intermediate arch, and guides on the first noted tie-bar in which the arms of the last noted arch are mounted for vertical movement and limited angular movement.

3. A cultivator including a main frame, crank-arm-equipped trunnions connected to the mainframe by vertical pivots, wheels journaled on thetrunnions, a tie-bar connecting said crank arms, two laterally spaced supplentiental frames, ground-working tools carried. by the supplemental frames, means flexibly connecting the supplemental frames in respect to the main frame, a tie-bar rigidly connecting the supplemental frames, means connecting the tie-bar of the supple mental frames to the first noted tie-bar for common transverse movement, but with free dom for vertical angular and raising and lowering; movements in respect thereto, and. means for raising and lowering the supple mental frames. 7

4;, A cultivator including a main frame, crank-arm-equipped trunnions connected to the main frame by vertical pivots, wheels journaled on the trunnions, a tie-bar connecting said crank arms, two laterally spaced supplemental frames, ground-working tools carried by the supplemental frames, means flexibly connecting the supplemental frames P in respect to the main frame, a tie-bar having an intermediate arch rigidly connecting the supplemental frames, bearings connected to the first noted tie-oar by horizontal swivels and having the vertical members of the arch of the tie-bar connecting the supplemental frames slidably mounted therein, and means for raising and lowering the supplemental frames.

5. A cultivator including a main frame, crank-arm-equipped trunnions connected to the main Frame byvertica-l pivots, Wheels journaled on the trunnions, a tie-bar having an intermediate arch connectingsaid crank arms, two laterally spaced supplemental frames, e'rounetworking tools carried by the supplemental frames means flexibly connecting the supplemei'ital frames in respect to the main "frame, a tie-bar having an inter mediate arch rigidly connectingthe supplemental frames, bearings connected to the first noted tie-bar on each side of its arch and having the vertical members otthc arch of the tie-bar connecting the supplemental frames slidably mounted therein, and means for raising and loweringthe supplemental frames. i

6. A cultivator including a main frame, acrank axle n'lounted on the main frame, wheels journaled: on the crank axle, two laterally spaced supplemental frames flexibly connected in respect to the main frame, a transverse rock-shaft having on its ends hubs journaled in hearings on the main frame a lever intermediately secured to the rock-shaft for oscillia-ting the same and having a co-operating lock segment secured to the main frame, hanger arms on. the main frame, a link connecting one of said hanger arms to the short end of said lever, a pair of links connecting said hanger arms in respect to the vertical member of the crank axle, a pair oi? levers pivoted on said hubs and having (ac-operating lock segments rigidly secured to said hubs. and flexible connections between the supplemental frames and said pair of levers.

'7. A cultivator including a main Frame,

JOSEPH J. KOVAR.

Witnesses HARRY D. Krneonn,

EVA E. Kama. L 

